/Engine/Source/Developer/AnimationDataController/Public/AnimDataController.h
Sets a single key for the attribute with provided identifier. Broadcasts a EAnimDataModelNotifyType::AttributeChanged notify if successful. In case a key for the provided key time already exists the key is replaced.
Whether or not the key was successfully set
virtual bool SetAttributeKey ( const [FAnimationAttributeIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationAttributeIdentifier) & AttributeIdentifier, float Time, const void * KeyValue, const [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct) * TypeStruct, bool bShouldTransact )